The mixing in all of this needs a lot of work. And a lot of the sounds don't really compliment the layers that they're over. A lot of the melodies also have low end, and low mids that they do not need (they clash with the 808s especially in that first beat)
Not exactly sure abt the sidechain with the 808 in the first one, I suggest panning elements and using Stereo Enhancer paired with S.Detune to get a more ethereal and clean vibe. Also remove all the lows and low mids out of the pads/synths so everything sounds less muddy.